What's this about?
Google's Antigravity added `/boost`, a deep reasoning mode invoked on demand.
What is an on-demand reasoning mode?
A way to spend more compute on one request. Reasoning models can think for longer before answering, and thinking longer costs proportionally more, so making it a per-request command lets the user decide when a problem deserves it. The design question is who chooses — some products decide automatically, some expose a setting, some make it a command. A slash command is the most explicit option and the one that makes cost legible to the person paying.
Why is it worth noticing?
HN 80 points, 56 comments
- It is the same design question as Fable 5.1's effort levels, and today both the answer and its cost showed up in the same digest.
- Explicit user control over reasoning depth is becoming the norm, which is good for cost and bad for people who do not know when to use it.
- Antigravity is Google's agentic coding surface, and it is now shipping the same primitives as the competition.